function swapSrc(obj){
	var cSrc = obj.src;
	if (cSrc.indexOf("_off.") > 0){cSrc = cSrc.replace("_off.","_on.");}
	else if (cSrc.indexOf("_on.") > 0){cSrc = cSrc.replace("_on.","_off.");}
	obj.src = cSrc;
}